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Finding the Fourth Proportional to 90,866, 125,395.04 and 50,578.90

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Solution

The fourth proportional to 90,866, 125,395.04 and 50,578.90 is: 69,798.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,866 : 125,395.04 = 50,578.90 : x
  2. Step 2: Convert to fraction form
    90,866/125,395.04 = 50,578.90/x
  3. Step 3: Cross multiply
    90,866x = 125,395.04 × 50,578.90
  4. Step 4: Simplify right side
    90,866x = 6,342,343,188.66
  5. Step 5: Solve for x
    x = 6,342,343,188.66/90,866
  6. Step 6: Final answer
    x = 69,798.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.